Bilaterale Halsfisteln - Ein Fallbericht

Einleitung: Laterale Halsfisteln gehören mit einem Prozentsatz von etwa 30% zu den zweithäufigsten kongenitalen Fehlbildungen des Halses. Sie sind auf Störungen der Involutionsvorgänge der 2. bis 4. Schlundtasche zurückzuführen.Dadurch kommt es zu einer Persistenz des Ductus cervicalis mit bleibender Öffnung nach außen. Mit nur 5% stellt die bilaterale Manifestation solcher Halsfisteln eine Rarität dar.Methoden/Ergebnisse: Im Januar 2015 stellte sich bei uns eine 24-jährige Patientin vor, die über eine seit der Kindheit intermittierend auftretenden Hautrötung, mit Absonderung von trübem Sekret, etwa oberhalb beider Sternoklavikulargelenke berichtete. Die äußeren Fistelanteile imponierten klinisch, jeweils am vorderen unteren Anteil der Musculi sternocleidomastoidei, als blande,nicht schmerzhafte Öffnungen. Die Diagnose wurde somit klinisch gestellt und sonographisch bestätigt. Therapeutisch, konnten mit Hilfe von Sonden die Gangsysteme in ihrer ganzen Ausdehnung verfolgt, freigelegt und in toto exstirpiert werden. Da sich die Fisteln beidseits bis zur Höhe der Fossa supratonsillaris erstreckten, erfolgte auch eine beidseitige Tonsillektomie. Zur Infektions-prophylaxe wurde perioperativ ein Cephalosporin der 2. Generation verabreicht. Im regelmäßigen klinischen follow-up ist die Patientin bisher rezidivfrei geblieben.Fazit: Bilaterale Phaynxfisteln stellen eine seltene Entität dar. Die Therapie der Wahl besteht auch in diesen Fällen, ähnlich zu den einseitig auftretenden, lateralen Halsfisteln, in der chirurgischen Intervention und vollständigen Resektion der Gänge in einem entzündungsfreien Intervall.Der Erstautor gibt keinen Interessenkonflikt an

Multi wall carbon nanotubes application for treatment of Cr(VI)-contaminated groundwater; Modeling of batch & column experiments

Multi wall carbon nanotubes (MWCNTs) are carbonaceous nanomaterials with novel adsorption properties. In this study MWCNTs were used as adsorbents for hexavalent chromium, Cr(VI), and the influence of operating parameters, on adsorption process, such as pH, MWCNTs and Cr(VI) concentration, and contact time have been investigated. Batch and column experiments were carried out in order to investigate the removal efficiency of MWCNTs for different Cr(VI) concentrations related to groundwater polluted by either anthropogenic activities or by geogenic processes. The experimental results showed that pH was the most crucial factor for adsorption efficiency. Cr(VI) adsorption was inversely proportional with pH value and more specifically adsorption was significantly decreased for pH values higher than 7. The effect of adsorbent's concentration showed the high adsorption capacity of MWCNTs. The adsorption process was very fast since was almost completed within 1 h. Different isotherm models have been adopted to interpret the experimental equilibrium data, as well as two mass-transfer based model were used to describe the dynamic behavior of Cr(VI) sorption phenomenon in column experiments

Recovery of Solid Waste in Industrial and Environmental Processes

In recent years, an alarming increase in CO2 emissions has been noticed [...

Recovery of Solid Waste in Industrial and Environmental Processes

In recent years, an alarming increase in CO2 emissions has been noticed [...

Brain abscess following intracerebral haemorrhage

A 79-year old male patient developed a brain abscess as infective transformation of a preceding intracerebral haemorrhage after urinary tract infection. The awareness of brain abscess formation at the site of intracerebral haemorrhage is crucial for early diagnosis and treatment of this rare but potentially fatal complication. (c) 2006 Elsevier Ltd. All rights reserved

Nanomaterials application for heavy metals recovery from polluted water: The combination of nano zero-valent iron and carbon nanotubes. Competitive adsorption non-linear modeling

Carbon Nanotubes (CNTs) and nano Zero-Valent Iron (nZVI) particles, as well as two nanocomposites based on these novel nanomaterials, were employed as nano-adsorbents for the removal of hexavalent chromium, selenium and cobalt, from aqueous solutions. Nanomaterials characterization included the determination of their point of zero charge and particle size distribution. CNTs were further analyzed using scanning electron microscopy, thermogravimetric analysis and Raman spectroscopy to determine their morphology and structural properties. Batch experiments were carried out to investigate the removal efficiency and the possible competitive interactions among metal ions. Adsorption was found to be the main removal mechanism, except for Cr(VI) treatment by nZVI, where reduction was the predominant mechanism. The removal efficiency was estimated in decreasing order as CNTs-nZVI > nZVI > CNTs > CNTs-nZVI* independently upon the tested heavy metal. In the case of competitive adsorption, Cr(VI) exhibited the highest affinity for every adsorbent. The preferable Cr(VI) removal was also observed using binary systems of the tested metals by means of the CNTs-nZVI nanocomposite. Single species adsorption was better described by the non-linear Sips model, whilst competitive adsorption followed the modified Langmuir model. The CNTs-nZVI nanocomposite was tested for its reusability, and showed high adsorption efficiency (the qmax values decreased less than 50% with respect to the first use) even after three cycles of use

A DPSIR Approach to Selected Cr(VI) Impacted Groundwater Bodies of Central Greece

The holistic approach of Driver-Pressure-State-Impact-Response (DPSIR) methodology was applied to selected Cr(VI) impacted groundwater bodies of Central Greece. The main driving forces in the study areas are agricultural activities, urban and industrial development as well as tourism. The main pressures induced by the anthropogenic activities are fertilizer use, uncontrolled urban sewage disposal and industrial effluents discharges. Groundwater stress is caused by the qualitative degradation due to Cr(VI), NO3−, Cl− and SO42− contamination. Hexavalent chromium occurrence is attributed to both geogenic and anthropogenic sources. The maximum Cr(VI) concentration (11.7 mg/L) was measured in Oinofyta area. Important impacts are the deterioration of groundwater body chemical status as well as the decline of groundwater use efficiency. Based on the applied DPSIR, a management framework is proposed in order to address the complex environmental issue of Cr(VI) in the study areas. © 2020, Springer Science+Business Media, LLC, part of Springer Nature

The role of activated carbon and disinfection on the removal of endocrine disrupting chemicals and non-steroidal anti-inflammatory drugs from wastewater

<div><p>Endocrine disrupting chemicals and non-steroidal anti-inflammatory drugs are two important groups of emerging pollutants due to their toxicological and chemical characteristics and their persistent detection in the aquatic environment. Wastewater treatment plants are a significant pathway for their transfer to the water courses. It is well evidenced that these chemicals are only partially removed through biological treatment of wastewater and therefore being detected in secondary effluents. This work focuses on the evaluation of the efficiency of two well-established disinfection technologies (chlorination and UV irradiation) along with UV/H ₂O ₂ and powdered activated carbon (PAC) to remove these chemicals from biologically treated wastewater. Based on the results it is shown that appreciable removal efficiencies due to chlorination should be expected for most of the target compounds, whereas this was not the case for ibuprofen and ketoprofen. With the exemption of diclofenac and ketoprofen direct UV irradiation did not efficiently removed target compounds for UV doses usually applied for disinfection purposes. The application of advanced UV treatment through the addition of H ₂O ₂ although resulted in increased removal of the target compounds is not sufficient at moderate UV and H ₂O ₂ doses to achieve satisfactory removal efficiencies. PAC use resulted in sufficient removal of target compounds although high PAC doses were required for some chemicals. Comparison of Freundlich isotherms of this study with those of other studies, derived employing water samples, suggested that the water matrix along with the target compounds concentration range can significantly affect the outcome of the experiments.</p></div